Manuals / Agilent Technologies / Computer Equipment / Computer Drive

Agilent Technologies U2761A Amplitude Modulation AM, To Select AM, Modulating frequency AM depth

Models: U2761A

1 123

Download 123 pages 50.59 Kb

Page 67

Features and Functions

2

Amplitude Modulation (AM)

A modulated waveform consists of a carrier waveform and a modulating waveform. An example of the AM waveform is shown in Figure 2- 14. In AM, the amplitude of the carrier is varied by the instantaneous voltage of the modulating waveform. The amount of amplitude modulation is called the modulation depth which refers to the portion of the amplitude range that will be used by the modulation.

Modulating frequency

AM depth

Figure 2-14 AM waveform

To Select AM

The U2761A allows only one modulation mode at a time. The

U2761A does not allow modulation when sweep is enabled.

U2761A User’s Guide

49

Image 67

Agilent Technologies U2761A manual Amplitude Modulation AM, To Select AM, Modulating frequency AM depth

Contents

User’s Guide U T I O N WA R N I N G Safety Symbols Use the device with the cables provided InstrumentPerformed by qualified personnels Environment Conditions Regulatory Markings Affixed product label is shown as below Product CategoryDeclaration of Conformity Regulatory Information for Australia/New Zealand This Guide… Contents Output Control Sweep Time Index List of Figures Trigger output pulse List of Tables Xviii Getting Started Introduction Various features of the U2761ABumpers Product at a GlanceProduct Outlook Top ViewRear View Fan Ventilation Pin backplane connector USB inletPower inlet Front View25.00 mm Product DimensionsDimensions Without Bumpers 105.00 mm 175.00 mm 18.00 mm117.00 mm 180.00 mm 15.00 mm Dimensions With Bumpers41.00 mm Standard Purchase Items Electrical Check Inspection and MaintenanceGeneral Maintenance Initial InspectionInstallation Installation and ConfigurationWith Agilent VEE Pro, LabVIEW, or Microsoft Visual Studio Hard-disk space 1 GB Check Your SystemInstall the IO Libraries Suite Install the Module Driver Install the Agilent Measurement Manager T E Proceeding Connect the Module to Your PCGetting Started Go to Start Control Panel and double-clickSystem Select Ignore to disable the warning messageGetting Started Verify Your Module Connection Send Commands To This Instrument Launch Your Agilent Measurement Manager IO Control will launch automatically when you start your PCT E Description Pin Backplane Connector Pin ConfigurationChassis Installation Triggering Pulse Waveform1Output functions Output ConfigurationIntroduction Output FunctionAmplitude Limitation Function LimitationWaveform pattern selection Waveform parameters Soft Front Panel OperationRemote Interface Operation Output Frequency2Output frequency range Duty Cycle Limitations Function LimitationsOffset Voltage Limitations Output AmplitudeLimits Due to Output Termination 4Panel view of the amplitude section Limits Due to Units SelectionLimits Due to Amplitude DC Offset VoltageVOLTageOFFSet offset Output Units Output Termination OUTPutLOAD ohmsINFinity Duty Cycle Duty Cycle Square WavesLimits Due to Frequency APPLy command automatically sets the duty cycle to 50% 9Ramp wave duty cycles Symmetry Ramp Wave11Panel view of the output section Output ControlExample 1, To output a DC voltage Set Output Using Scpi CommandsExample 2, To output a Sine wave Example 4, To output a Ramp wave Pulse Period Pulse Waveform13Panel view of the pulse width section Pulse WidthDuty Cycle = 100 ⋅ Pulse Width / Period Pulse Duty CycleExample Generate Pulse Waveform Using Scpi CommandsTo Select AM Amplitude Modulation AMModulating frequency AM depth 15Panel view of AM Carrier Waveform3Carrier frequency for AM Carrier FrequencyModulating Waveform Default modulating waveform is Sine waveModulation Depth Modulating Waveform FrequencyPeak into a 50 Ω load Generate AM Using Scpi Commands To Select FM Frequency Modulation FMModulating frequency FM deviation FMSTATe 0OFF1ON 4Carrier frequency for FM FMINTernalFUNCtion SINusoidSQUareRAMPNRAMpTRIangleUSER Frequency Deviation Generate FM Using Scpi Commands Modulating frequency Phase deviation Phase Modulation PMTo Select PM PMSTATe 0OFF1ON 5Carrier frequency for PM Default waveform is Sine wave Generate PM Using Scpi Commands Phase DeviationTo Select FSK Modulation Frequency-Shift Keying FSK ModulationFSK rate Hop frequency FSKeySTATe 0OFF1ON 6Carrier frequency for FSK FSK Carrier Frequency7Hop frequency FSK Hop FrequencyFSK Rate Generate FSK Modulation Using Scpi CommandsTo Select PSK Modulation Phase-Shift Keying PSK ModulationPSK rate PSK deviation PSKeySTATe 0OFF1ON 8Carrier frequency for PSK PSK Carrier FrequencyPSK Deviation PSK RateGenerate PSK Modulation Using Scpi Commands To Select ASK Modulation Amplitude-Shift Keying ASK ModulationASK rate ASKeySTATe 0OFF1ON 9Carrier frequency for ASK ASK Rate Generate ASK Modulation Using Scpi CommandsTo Select Sweep Frequency SweepFrequency Linear type Start frequency Stop frequency 28Panel view of sweep Start Frequency and Stop FrequencySweep Time Sweep ModeSweep Trigger Source Set Frequency Sweep Using Scpi Commands Trigger Source Choices TriggeringManual Triggering Internal TriggeringExternal Triggering Trigger out 500 μs Rising edge shown Trigger Input SignalTrigger Output Signal Trigger Rising edge shownOUTPutTRIGger 0OFF1ON OUTPutTRIGgerSLOPe POSitiveNEGative Set Triggering Using Scpi Commands To Create and Store an Arbitrary Waveform Arbitrary WaveformsSelect the Arbitrary waveform function Start waveform editing process Exiting the waveform editor Characteristics and Specifications Operating Environment Product CharacteristicsWaveforms Product Specifications and CharacteristicsRamp, Triangle ±5 V across open circuit Units Vpp, Vrms, dBm Resolution DigitsExternal frequency reference ±1% of settling ±5 mV ±10 mV @ Hi-ZModulation Sweep Characteristics 102 U2761A User’s Guide Index PSK United States Tel 800 829